+extern int zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages);
+extern int zfs_putpage(struct inode *ip, struct page *pp,
+ struct writeback_control *wbc);
+extern int zfs_map(struct inode *ip, offset_t off, caddr_t *addrp,
+ size_t len, unsigned long vm_flags);